/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
using EvaluationException = System.Qizx.Api.EvaluationException;
using QName = System.Qizx.Api.QName;
using Comparison = System.Qizx.Util.Basic.Comparison;
using ComparisonContext = System.Qizx.XQuery.ComparisonContext;
using XQItem = System.Qizx.XQuery.XQItem;
using XQItemType = System.Qizx.XQuery.XQItemType;
using XQType = System.Qizx.XQuery.XQType;
namespace System.Qizx.XQuery.Dt
{
	
	public class UntypedAtomicType:StringType
	/* trick to share code */
	{
		public override QName Name
		{
			get
			{
				return XQType.untypedAtomic;
			}
			
		}
		public override string ShortName
		{
			get
			{
				return "untypedAtomic";
			}
			
		}
		
		public override int quickCode()
		{
			return QT_UNTYPED;
		}
		
		public override string ToString()
		{
			return "xs:untypedAtomic";
		}
		
		// compares an atomic value with another item
		// item1 is assumed to be a node or untypedAtomic
		public static int comparison(XQItem item1, XQItem item2, ComparisonContext context, int flags)
		{
			XQItemType type2 = item2.ItemType;
			// if second argument is _typed_ atomic, use its type:
			if (type2 != XQType.UNTYPED_ATOMIC && !type2.IsSubTypeOf(XQType.NODE))
			{
				int cmp = item2.CompareTo(item1, context, flags);
				// reverse comparison:
				switch (cmp)
				{
					
					case Comparison.GT: 
						return Comparison.LT;
					
					case Comparison.LT: 
						return Comparison.GT;
					
					default: 
						return cmp;
					
				}
			}
			// both items are UNTYPED_ATOMIC/Node: string compare
			return StringValue.compare(item1.ValueAsString, item2.ValueAsString, (context != null)?context.getCollator():null);
		}
	}
}